RefCounted types should not have public destructors, Linux fixes

base/message_pump_x.h

Index: base/message_pump_x.h
diff --git a/base/message_pump_x.h b/base/message_pump_x.h
index 85f7c8d6d8d9d59e6deac361f7bc190529d6adfe..c9cfda865e4f9a28202ba82767ea863b954009b2 100644
--- a/base/message_pump_x.h
+++ b/base/message_pump_x.h
@@ -23,7 +23,6 @@ namespace base {
 class BASE_EXPORT MessagePumpX : public MessagePumpGlib {
  public:
   MessagePumpX();
-  virtual ~MessagePumpX();
 
   // Returns default X Display.
   static Display* GetDefaultXDisplay();
@@ -38,6 +37,9 @@ class BASE_EXPORT MessagePumpX : public MessagePumpGlib {
   // all available X events.
   gboolean DispatchXEvents();
 
+ protected:
+  virtual ~MessagePumpX();
+
  private:
   // Initializes the glib event source for X.
   void InitXSource();